Create a photorealistic image of a hedgehog that has burrowed into a watermelon, happily eating the juicy fruit from the inside. The hedgehog is partially inside the watermelon, with its cute face and spines clearly visible. In the background, depict a lush field of watermelons, showcasing vibrant green vines and ripe watermelons under a bright, sunny sky. The scene should convey a sense of whimsy and delight in nature.